>>16701610 (OP)Actual IQ or IQ score? For actual, there's not really much you can do to increase it. You can just stop retarding it. Get plenty of sleep, don't use drugs or alcohol. Don't be depressed. This will allow you to be at your full IQ most of the time.
For IQ score, it depends on the test you're taking. All the novelty tests can be manipulated with some understanding of the test and some practice. For the actual tests given by mental health professionals, you can try to prep, and maybe you can even get yourself a few extra points, but in general, unless you have access to the specific question set ahead of time, you can't really prep beyond having enough sleep, not being drugged, etc.